Granted Patent
Utility
US 4,649,317 · App. 06/769,970
Multibeam electron gun having means for supporting a screen grid electrode relative to a main focusing lens
Inventor:
Stephen T. Opresko
Patented Case
View Patent ↗
Granted: Mar 10, 1987
Filed: Aug 27, 1985
Inventor
Stephen T. Opresko
Assignee (at issue)
RCA Corporation
This patent predates the USPTO's electronic file wrapper — prosecution documents from this era exist only in the Patent Office's paper records. A certified copy of the file history can be ordered from the USPTO's paper archives.